I was still having some problems with filling up at the pump. From what I'm seeing now its basically 2 factors.

1) The gas pump isn't 100% great. The valve that capture the vapors is probly not that great.

2) its not in far enough.

Now I went and tested this on one of the pump that always gives me problems (bad valve seal maybe) and went to pump. not surprising it cuts off. so I stop, and tilt it up slightly and really pushed the pump in. this works pretty good, but if your arm gets tired, gonna have to repeat it. Man I wish nissan would have a real fix for this, my biggest nightmare is trying to pump when the tank is full and have all the gas spill out